Re: kern/56355: dtrace triggers double-fault in supervisor mode

[bch <brad.harder%gmail.com@localhost>]

The following reply was made to PR kern/56355; it has been noted by GNATS.

From: bch <brad.harder%gmail.com@localhost>
To: gnats-bugs%netbsd.org@localhost, "riastradh%netbsd.org@localhost" <riastradh%netbsd.org@localhost>
Cc: 
Subject: Re: kern/56355: dtrace triggers double-fault in supervisor mode
Date: Tue, 10 Aug 2021 11:49:28 -0700

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 On Tue, Aug 10, 2021 at 00:25 <gnats-admin%netbsd.org@localhost> wrote:
 
 > Thank you very much for your problem report.
 > It has the internal identification `kern/56355'.
 > The individual assigned to look at your
 > report is: kern-bug-people.
 >
 > >Category:       kern
 > >Responsible:    kern-bug-people
 > >Synopsis:       dtrace triggers double-fault in supervisor mode
 > >Arrival-Date:   Tue Aug 10 07:25:00 +0000 2021
 >
 
 ~50000 probes, and I found one that simply shouldn=E2=80=99t be there. Prop=
 osed
 patch after discussion w @riastradh:
 
 --- a/external/cddl/osnet/dev/fbt/fbt.c Thu Aug 05 09:46:09 2021 -0700
 +++ b/external/cddl/osnet/dev/fbt/fbt.c Tue Aug 10 11:39:10 2021 -0700
 @@ -178,6 +178,7 @@
             strncmp(name, "lockdebug_", 10) =3D=3D 0 ||
             strncmp(name, "kauth_", 5) =3D=3D 0 ||
             strncmp(name, "ktext_write", 11) =3D=3D 0 ||
 +           strncmp(name, "trap", 4) =3D=3D 0 ||
             strncmp(name, "fbt_", 4) =3D=3D 0) {
                 return (1);
         }
 
 
 
 
 
 
 >
 
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 <div><br></div><div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
 =3D"gmail_attr">On Tue, Aug 10, 2021 at 00:25 &lt;<a href=3D"mailto:gnats-a=
 dmin%netbsd.org@localhost">gnats-admin%netbsd.org@localhost</a>&gt; wrote:<br></div><blockquote=
  class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
 d;padding-left:1ex">Thank you very much for your problem report.<br>
 It has the internal identification `kern/56355&#39;.<br>
 The individual assigned to look at your<br>
 report is: kern-bug-people. <br>
 <br>
 &gt;Category:=C2=A0 =C2=A0 =C2=A0 =C2=A0kern<br>
 &gt;Responsible:=C2=A0 =C2=A0 kern-bug-people<br>
 &gt;Synopsis:=C2=A0 =C2=A0 =C2=A0 =C2=A0dtrace triggers double-fault in sup=
 ervisor mode<br>
 &gt;Arrival-Date:=C2=A0 =C2=A0Tue Aug 10 07:25:00 +0000 2021<br>
 </blockquote><div dir=3D"auto"><br></div><div dir=3D"auto">~50000 probes, a=
 nd I found one that simply shouldn=E2=80=99t be there. Proposed patch after=
  discussion w @riastradh:</div><div dir=3D"auto"><br></div><div dir=3D"auto=
 "><div dir=3D"auto">--- a/external/cddl/osnet/dev/fbt/fbt.c Thu Aug 05 09:4=
 6:09 2021 -0700</div><div dir=3D"auto">+++ b/external/cddl/osnet/dev/fbt/fb=
 t.c Tue Aug 10 11:39:10 2021 -0700</div><div dir=3D"auto">@@ -178,6 +178,7 =
 @@</div><div dir=3D"auto">=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 strncmp=
 (name, &quot;lockdebug_&quot;, 10) =3D=3D 0 ||</div><div dir=3D"auto">=C2=
 =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 strncmp(name, &quot;kauth_&quot;, 5)=
  =3D=3D 0 ||</div><div dir=3D"auto">=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0 strncmp(name, &quot;ktext_write&quot;, 11) =3D=3D 0 ||</div><div dir=3D=
 "auto">+ =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 strncmp(name, &quot;trap&quot;,=
  4) =3D=3D 0 ||</div><div dir=3D"auto">=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
 =C2=A0 strncmp(name, &quot;fbt_&quot;, 4) =3D=3D 0) {</div><div dir=3D"auto=
 ">=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 return (1);</div>=
 <div dir=3D"auto">=C2=A0 =C2=A0 =C2=A0 =C2=A0 }</div><div dir=3D"auto"><br>=
 </div></div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></div><div di=
 r=3D"auto"><br></div><div dir=3D"auto"><br></div><blockquote class=3D"gmail=
 _quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:=
 1ex"><br>
 </blockquote></div></div>
 
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